RESPONSIVE LIFE OF ORGANISMS 



The earliest human tools were very 

 simple; a club, a flint stone; such things 

 as might be selected from nature already 

 fitted to the hand. Better tools fol- 

 lowed when a little labor was added to 

 their preparation. A split stick lashed 

 to the flint gave a stone ax; and split- 

 ting and sharpening of the flint yielded 

 stone knives. A great variety of tools 

 of stone and wood and bone and horn 

 followed; and, later, tools of bronze and 

 of iron. Indeed, the kinds of tools man- 

 kind has used furnish a fair index of the 

 progress of the race. Cutting tools es- 

 pecially have been made the basis of 

 ethnological classifications. 



The use of fire. Man is the only 

 animal that uses fire. Many animals 

 undoubtedly enjoy the glow of its 

 warmth; and some of our domesticated 

 animals appear to be sensible of the im- 9 

 provement it makes in the cooking of 

 food. But no animal has attained to 

 the idea of adding a stick of wood to keep 

 a fire burning. ^_ 



491 



fA 



h i\ 



Fire was the first 



FIG. 274. Primitive vEr^ 

 tools, a a chipped flint X~~ 



of nature's resources C ?Y f H v n & J 



to be pressed into ^Tr^S.' /; a f5 



human Qprvirp Its ^* nt s P ear head g, a / ^ 



numan service, its bone fish hook ^ t - 



ncp an-n^nrc fr> Via^rp bone needles. j. a W I' 



use appears to nave wooden bowl kt a l|y 



lippn lirnn-wrn tn a 1 1 wooden comb. 2. a If 



\ known to au necklace of teeth and 

 races and tribes of claws - 



mankind, throughout human history. It served prime- 

 val man in many ways. It increased his physical comfort. 



